http://bugs.winehq.org/show_bug.cgi?id=13046
--- Comment #7 from Ben Mayhew ben-dev@gmx.net 2008-05-09 13:19:41 --- The events that the thread is waiting for when it gets stuck all belong to the main thread and there are no clues as to why they should or shouldn't be triggered.
So I guess there's no sensible way of progressing. Hopefully it's an indirect result of another bug and will get fixed automatically.